What is your opinion in regards to the statement of the one who says: Indeed one who comitts shirk and kufr is not declared to be an unbeliever, except after him having knowledge of the affair in its entirety?

If the likes of this person is ignorant, due to him residing in a land which is cut off and nothing has reached him, then he is excused [for his ignorance]. As for the one who lives in the land of the Muslims, hearing the Qu'ran, hearing the Ahadeeth, hearing the speech of the people of knowledge [Scholars], then this one is not excused with ignorance; since the proof has been established upon him.